# G-Code Guru: CNC Machinist Kit — Editor, Calculator & Tooling

> Offline CNC G-code reference, calculator, editor, and learning tool for machinists. (iPhone/iPad app by Pawel Dembski.)

- Source: https://appshunter.io/ios/app/g-code-guru-cnc-machinist-kit/id6758800091 (this page in markdown: same URL + `.md`)
- Developer: [Pawel Dembski](https://appshunter.io/developer/1752941251)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings
- Age rating: 4+
- Requires: iOS 26.0 · 30 MB
- Languages: American English, German (Germany), Japanese, Korean, Polish, Russian, Chinese (Simplified, China), European Spanish
- Released: 2026-03-25
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/g-code-guru-cnc-machinist-kit/id6758800091/reviews.md

## What is G?

Stop Googling G-codes on the shop floor. G-Code Guru puts every reference, calculator, and lesson a CNC programmer needs right in your pocket - fully offline, ready at the machine.

REFERENCE
- 124 G-Code and M-Code entries with descriptions, examples, and usage notes
- 7 controllers: Fanuc, Haas, Siemens, Mazak, Okuma, Grbl, Marlin
- Search, filter by category, and save favorites for quick access

CODE EDITOR
- Syntax highlighting for G-Code with line numbers
- Real-time validation catches errors before your machine does
- Safety checks: spindle, tool length comp, safe Z, program endings
- Safe code templates for headers, tool changes, and endings
- Export programs as .nc files, ready for the controller

SPEEDS & FEEDS CALCULATOR
- Calculate RPM, feed rate, chip load, and material removal rate
- Material database: aluminum, steel, stainless, titanium, plastics, composites
- Tool database: end mills, drills, taps, inserts
- Save favorite calculation presets

TRIGONOMETRY CALCULATOR
- Right triangle solver
- Bolt circle generator
- Taper and angle calculations

TOOLING LIBRARY
- Cutting tools: end mills, drills, taps, reamers, boring bars, turning tools
- Tool holders: CAT, BT, HSK, ER collets, straight shank, Morse taper
- Insert specifications: CNMG, WNMG, DNMG, and more
- Thread specs: UNC, UNF, Metric, NPT, BSP
- Drill and tap charts with tap drill reference

LEARNING PATH
- 55 structured lessons across 11 modules
- 163 quiz questions with immediate feedback
- 15 interactive code challenges with validation
- Topics: fundamentals, motion, tool management, M-codes, safety, macro programming, multi-axis, lathe, 3D printing
- Track your progress and bookmark lessons

KNOWLEDGE BASE
- In-depth articles on chip load, surface speed, tool materials, formulas, and best practices

SCAN & ANALYZE
- Point your camera at a machine screen or printed program
- On-device OCR extracts the G-Code
- AI-powered analysis explains what the program does step by step
- Safety assessment flags missing safety blocks and risky moves
- Import scanned code into the editor

BUILT FOR THE SHOP FLOOR
- 100% offline - no internet required
- Dark industrial theme, easy on the eyes
- Works on iPhone and iPad

G-Code Guru Pro unlocks the full toolkit: all 11 learning modules, unlimited saves, the complete tooling library, knowledge base, calculation presets, code scanning analysis, and every future update.

Privacy Policy: https://gcode-guru-legal.pages.dev/privacy
Terms of Use: https://gcode-guru-legal.pages.dev/terms

## Key features

- Offline G-code and M-code reference
- Code editor with syntax highlighting and safety checks
- Speeds & feeds calculator
- Trigonometry calculator
- Tooling library
- Structured learning path with quizzes
- AI-powered code scanning and analysis

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Annual | $19.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| G-Code Guru Pro | $59.99 | one-time |



## Frequently asked questions about G

### Does G-Code Guru have ads?

G-Code Guru is ad-free, allowing for an uninterrupted user experience while working on the shop floor. This means you can access all its features without any advertisements interrupting your workflow.

### What is the cost of G-Code Guru?

G-Code Guru is free to download and use, with an optional 'Pro Annual' subscription available for $19.99 per year. The Pro version unlocks the full toolkit, including all learning modules and advanced features.

### How often is G-Code Guru updated?

The app was last updated on June 26, 2026, indicating a commitment to ongoing development and improvements. Users can expect regular updates to enhance features and add new content.

### What devices is G-Code Guru compatible with?

G-Code Guru is built for the shop floor and works on iPhone and iPad devices. Its design is optimized for easy viewing and use on these platforms.

### What learning methodology does G-Code Guru use?

G-Code Guru offers a structured learning path with 55 lessons across 11 modules, 163 quiz questions with immediate feedback, and 15 interactive code challenges. This approach combines theoretical knowledge with practical application.

### Can I track my progress in G-Code Guru?

Yes, users can track their progress through the structured learning path and bookmark lessons they find particularly useful. This feature helps in monitoring learning achievements and revisiting key topics.

### What are the benefits of the G-Code Guru Pro subscription?

The Pro subscription unlocks the complete tooling library, all 11 learning modules, the knowledge base, calculation presets, code scanning analysis, and all future updates. It provides unlimited access to the app's full capabilities.

### How does G-Code Guru's AI analysis work?

The AI-powered analysis uses on-device OCR to extract G-code from images of machine screens or printed programs. It then explains the program step-by-step and flags potential safety issues.

## Version history (last 5 releases)

### 1.2 — 2026-07-07

Fixed an issue that could prevent purchases from completing

### 1.1.2 — 2026-06-26

This update fixes two issues in the Speeds & Feeds calculator:

• Fixed a crash that could happen after switching between metric and imperial units.
• Fixed your default unit system from Settings not being applied - the calculator now opens in your preferred units.

### 1.1.1 — 2026-05-27

Small bug fixes and improvements.

### 1.1 — 2026-05-25

G-Code Guru now supports:
Polish, German, Spanish, Japanese, and Chinese (Simplified) every reference, lesson, and calculator fully translated.

Also: smoother Calculator, polished Editor save flow, locale-aware number formatting, and bug fixes
throughout.

### 1.0 — 2026-03-25

No release notes.

## More apps by Pawel Dembski

- [EGGY Pro - Smart Egg Timer](https://appshunter.io/ios/app/eggy-pro-smart-egg-timer/id6504585116)
- [ADHD Structure Planner: Simple](https://appshunter.io/ios/app/adhd-structure-planner-simple/id6742843891)
- [Interior AI: ReVive](https://appshunter.io/ios/app/interior-ai-revive/id6746723867)
- [Whisperer AI: Notes & Recorder](https://appshunter.io/ios/app/whisperer-ai-notes-and-recorder/id6755069300)

All apps by Pawel Dembski: https://appshunter.io/developer/1752941251

## Related topics

[cnc machinist](https://appshunter.io/ios/topics/cnc-machinist) · [cnc code](https://appshunter.io/ios/topics/cnc-code) · [gcode](https://appshunter.io/ios/topics/gcode) · [machinist](https://appshunter.io/ios/topics/machinist)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*